The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2000
Filed:
Mar. 31, 1999
Applicant:
Inventor:
Akira Terao, Nagoya, JP;
Assignee:
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D05B / ;
U.S. Cl.
CPC ...
112254 ;
Abstract
A sewing machine includes a thread tension applying mechanism for applying tension to a needle thread supplied from a needle thread supply source to a sewing needle, a thread tension releasing mechanism for releasing the thread tension applying mechanism from a tension applying state, a spring for driving the thread tension releasing mechanism, a switching mechanism for switching the spring between an operative state and a non-operative state, and a drive source for driving the switching mechanism.